// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package cli

import "github.com/BurntSushi/toml"

// config is the configuration for gvisor containerd shim.
type config struct {
	// RuncShim is the shim binary path for standard containerd-shim for runc.
	// When the runtime is `runc`, gvisor containerd shim will exec current
	// process to standard containerd-shim. This is a work around for containerd
	// 1.1. In containerd 1.2, containerd will choose different containerd-shims
	// based on runtime.
	RuncShim string `toml:"runc_shim"`
	// RunscConfig is configuration for runsc. The key value will be converted
	// to runsc flags --key=value directly.
	RunscConfig map[string]string `toml:"runsc_config"`
}

// loadConfig load gvisor containerd shim config from config file.
func loadConfig(path string) (*config, error) {
	var c config
	_, err := toml.DecodeFile(path, &c)
	if err != nil {
		return &c, err
	}
	return &c, nil
}